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fft

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fft [Thu May 30 12:07:37 2013] Alexander |
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- | ====== Fast Fourier Transform (FFT) (Pro edition only) ====== | + | ====== Fast Fourier Transform (FFT) ====== |

Open Table or Figure or Plot with initial data and use '' | Open Table or Figure or Plot with initial data and use '' | ||

Fast Fourier transform algorithm computes discrete Fourier transform exactly and is used to considerably speed up the calculations.\\ Note that FFT is not an approximate method of calculation. | Fast Fourier transform algorithm computes discrete Fourier transform exactly and is used to considerably speed up the calculations.\\ Note that FFT is not an approximate method of calculation. | ||

- | |||

- | MagicPlot uses the algorithm of FFT that does not necessarily require the number of points //N// to be an integer power of 2, though in such a case evaluation is faster. MagicPlot uses [[http:// | ||

{{: | {{: | ||

- | ===== Formulas ===== | + | ===== Parameters ===== |

+ | | ||

+ | ^ Sampling Interval | ||

+ | ^ Real, \\ Imaginary | ||

+ | ^ Forward / \\ Inverse | ||

+ | ^ 1/N in forward transform | ||

+ | ^ Center zero frequency | ||

+ | | ||

+ | ===== Algorithm ===== | ||

+ | | ||

+ | MagicPlot uses the algorithm of FFT that does not necessarily require the number of points //N// to be an integer power of 2, though in such a case evaluation is faster. MagicPlot uses [[http:// | ||

==== Discrete Fourier Transform Formulas ==== | ==== Discrete Fourier Transform Formulas ==== | ||

By default MagicPlot uses ' | By default MagicPlot uses ' | ||

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* Missing values in the end of the column are ignored. | * Missing values in the end of the column are ignored. | ||

- | ===== Parameters ===== | + | ===== See Also ===== |

- | ^ Sampling Interval | + | * [[processing]] |

- | ^ Real, \\ Imaginary | + | |

- | ^ Forward / \\ Inverse | + | |

- | ^ 1/N in forward transform | + | |

- | ^ Center zero frequency | | + |

fft.1369901257.txt.gz · Last modified: Sun Nov 8 12:20:32 2015 (external edit)

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